[CAUT] Grinding plate counter-bearing

[McCoy, Alan]

Hi Don,

I have never done this with the pins in. An angle die grinder with various carbide burrs will work fine to hog off the majority of the material. I use burrs with several shapes - christmas tree, cylindrical and one I find particularly useful is one like this: [cid:3394530517_6050391]   Then, still using the die grinder switch to a 2" sanding disc. Start with 36 grit, then move up in grits. That'll get you a decently flat surface.

I don't think I'd use a Dremel for this work mostly because I just prefer using air tools. Wear a mask. The cast iron bits will go everywhere so cover everything up well, and because you are in a home (yikes!) you might use a vacuum as you work.

Alan McCoy

________________________________
From: Don Mannino <dmannino at kawaius.com>
Reply-To: CAUTlist <caut at ptg.org>
Date: Tue, 26 Jul 2011 09:11:01 -0700
To: CAUTlist <caut at ptg.org>
Subject: [CAUT] Grinding plate counter-bearing

Hi all,

I have a little project I need to work on, and thought I would ask for some advice.  I need to grind the treble counter-bearings off of the plate of a piano in a customer's home.  I am hoping someone here has a good suggestion for which tool works best to give a clean removal that stays relatively flat.  I would like to avoid screwing up the plate finish nearby, and leave a flat surface that I can put a half-round on.

With the tuning pins staying in place, I'm thinking a flat grinding wheel might not fit in there.  I can use a Dremel, but am worried it will be very hard to get it smooth and level.

Keeping in mind the need to do it in the home, any suggestions?  Dremel with a specific tip, maybe?

Don Mannino RPT


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